Of my 3 only Misty does the awoowoowoo. Stevie doesn't make many noises but does have a frustrated moany groan ( that sounds like someone rolling their r's) if I'm taking too long getting her food ready, or if we have to wait ages to cross the road to get to the park.
Jimmy despite not doing the awoowoowoo has a very full vocabulary - you always know exactly how he feels about anything and everything.
Bella's a real grumbler as well, if you remember those public safety ads there used to be with Charlie's cat ("Charlie's cat says never get into cars with strangers" etc etc) she reminds me of that, "grrow-row-rowlf-mmm-row-rowlf-growlf" etc etc, she can talk for England!
That's funny, Jimmy has a weird noise I've always thought of as being like the 'Charlie Says' cat. It's usally when he's been whining for something and come to the realisation that I'm not going to act on his demands, the whine turns into an indignant yawn which sounds like a strangled cat.